Pinpoint Test A: The Clock Is Inoperative

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to BATTERY, MOUNTING AND CABLES article.

A1 CHECK CIRCUIT SBP14 (BN/RD) FOR VOLTAGE
- Ignition OFF.
- Disconnect: Clock C2016.
- Measure the voltage between the clock C2016-6, circuit SBP14 (BN/RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between Clock C2016-6 And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes: GO to A2 .
- No: VERIFY the SJB fuse 14 (10A) is OK. If OK, GO to A3. TEST the system for normal operation. If not OK, REFER to the SYSTEM WIRING DIAGRAMS article for Expedition, SYSTEM WIRING DIAGRAMS article for Expedition EL, SYSTEM WIRING DIAGRAMS article for Navigator or SYSTEM WIRING DIAGRAMS article for Navigator L to identify the possible causes of the circuit short.
A2 CHECK CIRCUIT GD138 (BK/WH) FOR AN OPEN
- Disconnect: Negative Battery Cable.
- Measure the resistance between the clock C2016-5, circuit GD138 (BK/WH), harness side and ground.
  
  Fig 2: Measuring Resistance Between Clock C2016-5 And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: INSTALL a new clock. REFER to CLOCK in this article. TEST the system for normal operation.
- No: REPAIR the circuit. TEST the system for normal operation.
A3 CHECK CIRCUIT SBP14 (BN/RD) FOR AN OPEN
- Disconnect: SJB C2280b.
- Measure the resistance between the SJB C2280b-4, circuit SBP14 (BN/RD), harness side and the clock C2016-6, circuit SBP14 (BN/RD), harness side.
  
  Fig 3: Measuring Resistance Between SJB C2280B-4 And Clock C2016-6
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes: GO to A4 .
- No: REPAIR the circuit. TEST the system for normal operation.
A4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - damaged pins
  - pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes: INSTALL a new SJB . REFER to MULTIFUNCTION ELECTRONIC MODULES article. TEST the system for normal operation.
No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.